Global Patent Index - EP 2757818 A2

EP 2757818 A2 20140723 - Method and system for quantized feedback rate adaptation in a communication system

Title (en)

Method and system for quantized feedback rate adaptation in a communication system

Title (de)

VERFAHREN UND SYSTEM FÜR QUANTISIERTE RÜCKKOPPLUNGSRATENADAPTION IN EINEM KOMMUNIKATIONSSYSTEM

Title (fr)

PROCÉDÉ ET SYSTÈME POUR UNE ADAPTATION DE TAUX DE RÉTROACTION QUANTIFIÉE DANS UN SYSTÈME DE COMMUNICATION

Publication

EP 2757818 A2 20140723 (EN)

Application

EP 14165192 A 20100507

Priority

  • EP 14165192 A 20100507
  • EP 10850964 A 20100507
  • CN 2010072526 W 20100507

Abstract (en)

The present invention relates to a method for adapting the feedback rate of a quantized representation of the propagation channel in a capacity-limited feedback channel. The method comprises obtaining a reference signal from an access point; deriving a rank indication, a codebook subset selection indication and a precoding matrix index based on the obtained reference signal; sending a first feedback message conveying the rank indication and the codebook subset selection indication, and sending a second feedback message conveying the precoding matrix index, to the access point; and receiving, from the access point, data precoded by a matrix derived based on the rank indication, the codebook subset selection indication and the precoding matrix index.

IPC 8 full level

H04B 7/06 (2006.01); H04W 8/22 (2009.01)

CPC (source: EP US)

H04B 7/063 (2013.01 - EP US); H04B 7/0639 (2013.01 - EP US); H04B 7/0647 (2013.01 - EP US)

Citation (applicant)

  • "Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channel coding", 3GPP TS 36.212
  • "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures", 3GPP TS 36.213
  • "Further Refinements of Feedback Framework, Ericsson", 3GPP RANI, April 2010 (2010-04-01)
  • "Further results of DL 8TX codebook, Huawei", 3GPP RANI, April 2010 (2010-04-01)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DOCDB simple family (publication)

WO 2011137595 A1 20111110; AU 2010352827 A1 20121206; AU 2010352827 B2 20140306; CN 102939775 A 20130220; CN 102939775 B 20150708; EP 2567558 A1 20130313; EP 2567558 A4 20130501; EP 2567558 B1 20140730; EP 2757818 A2 20140723; EP 2757818 A3 20140924; ES 2513466 T3 20141027; RU 2516596 C1 20140520; US 2013058386 A1 20130307; US 9287959 B2 20160315

DOCDB simple family (application)

CN 2010072526 W 20100507; AU 2010352827 A 20100507; CN 201080066567 A 20100507; EP 10850964 A 20100507; EP 14165192 A 20100507; ES 10850964 T 20100507; RU 2012152650 A 20100507; US 201213670097 A 20121106